driz,
Do you mean a song that YOU wrote that hasn't been published or "covered" by ANYONE? Just curious because, not sure, but I think you'd want to get copyrights for yourself FIRST, before putting it in ANY format. I'm sure there are others that would like to do the same with their music as well. GOOD QUESTION!! I'll bet there are programs and software available ( I keep thinking of Windmill Music from the UK that does "parody" karaoke discs...funny stuff) and believe that they MUST have used some type of program to change ALL the lyrics. I believe they also "orchestrated" the music with "midi's". Not sure, but I think if you "google" them, you could probably get more info in that regard.
Donny "B" 8)